EP4336601A1 - Batteriesuspension, positivelektrodenfolie, negativelektrodenfolie und lithiumbatterie - Google Patents

Batteriesuspension, positivelektrodenfolie, negativelektrodenfolie und lithiumbatterie Download PDF

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Publication number
EP4336601A1
EP4336601A1 EP22941543.5A EP22941543A EP4336601A1 EP 4336601 A1 EP4336601 A1 EP 4336601A1 EP 22941543 A EP22941543 A EP 22941543A EP 4336601 A1 EP4336601 A1 EP 4336601A1
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EP
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Prior art keywords
positive electrode
negative electrode
battery
organic additive
slurry
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EP22941543.5A
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English (en)
French (fr)
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EP4336601A4 (de
EP4336601B1 (de
Inventor
Linping LIAO
Shiwen Wang
Lili Yu
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Hithium Tech HK Ltd
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Xiamen Hithium Energy Storage Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure belongs to the field of lithium batteries, and in particular, to a battery slurry, a positive electrode plate, a negative electrode plate, and a lithium battery.
  • An aqueous binder for a lithium battery has the characteristics of low cost and environmental friendliness, but its use is limited by hard and brittle electrode plates caused during the process of preparing the electrode plates. In view of the hard and brittle electrode plates caused by the aqueous binder, powder falls from the plate, and is easily introduced into the battery, resulting in internal short-circuit and even fire and explosion. However, there is no good solution to solve this problem yet.
  • an object of the present disclosure is to provide a battery slurry, a positive electrode plate, a negative electrode plate, and a lithium battery.
  • the battery slurry is used to effectively solve the problem of hard and brittle electrode plates caused by the use of existing binders.
  • a thick coating is unlikely to crack, a cold-pressed electrode plate is unlikely to break, powder is unlikely to fall in die-cutting and winding processes, thereby avoiding short-circuit inside a battery, and even fire, explosion, and other safety accidents.
  • the present disclosure provides a battery slurry.
  • the battery slurry includes an aqueous binder and an organic additive.
  • the organic additive includes at least one of -NHR and -SH, where R is alkyl.
  • the aqueous binder and the organic additive includes at least one group of -NHR and -SH
  • the organic additive includes at least one group of -NHR and -SH
  • the battery slurry according to the above embodiment of the present disclosure may further have the following additional technical features.
  • a mass ratio of the aqueous binder to the organic additive is 22: (0.5 to 2). Therefore, the problems of hard and brittle electrode plates, powder fall and the like caused by the use of existing binders can be effectively solved.
  • a monomer of the aqueous binder includes at least one of acrylate, acrylic acid, acrylonitrile, or acrylamide.
  • the organic additive includes at least one of N-methylacetamide, triethylamine, acetamide, ethylenediamine, ethanethiol, 1,2-ethanedithiol, or polythiol. Therefore, the problems of hard and brittle electrode plates, powder fall and the like caused by the use of existing binders can be effectively solved.
  • the battery slurry is a positive electrode slurry
  • the positive electrode slurry includes a positive electrode active material, a conductive agent, the aqueous binder, and the organic additive.
  • a mass ratio of the positive electrode active material, the conductive agent and a sum of the aqueous binder to the organic additive is (94 to 98): (0.5 to 6): (2 to 5).
  • the battery slurry is a negative electrode slurry, and the negative electrode slurry includes graphite, a conductive agent, the aqueous binder, and the organic additive.
  • a mass ratio of the graphite, the conductive agent to a sum of the aqueous binder and the organic additive is (94 to 98): (0.5 to 6): (2 to 5).
  • the present disclosure provides a positive electrode plate.
  • the positive electrode plate includes a positive electrode current collector and a positive electrode active material layer formed on a surface of the positive electrode current collector.
  • the positive electrode active material layer is formed from the positive electrode slurry.
  • the positive electrode slurry is coated on the surface of the positive electrode current collector to form the positive electrode plate.
  • the organic additive in the positive electrode slurry has polar functional groups, and thus can interact with carboxyl and ester group of the aqueous binder, as well as the conductive agent, the positive electrode active material and the like to generate intermolecular forces, thereby achieving uniform dispersion of the positive electrode active material. Meanwhile, during the coating drying process, the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist the stress caused by the evaporation of the solvent during the drying process, such that the film surface is unlikely to crack.
  • the positive electrode plate has flexibility and toughness while maintaining excellent bonding performance, such that the problem of hard and brittle electrode plates caused by the use of existing binders can be effectively solved.
  • a thick coating is unlikely to crack, a cold-pressed electrode plate is unlikely to break, and powder is unlikely to fall in die-cutting and winding processes, thereby avoiding short-circuit inside a battery, and even fire, explosion, and other safety accidents.
  • the present disclosure provides a negative electrode plate.
  • the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer formed on a surface of the negative electrode current collector.
  • the negative electrode active material layer is formed from the negative electrode slurry.
  • the negative electrode slurry is coated on the surface of the negative electrode current collector to form the negative electrode plate.
  • the organic additive in the negative electrode slurry has polar functional groups, and thus can interact with carboxyl and ester group of the aqueous binder, the negative electrode active material and the like to generate intermolecular forces, thereby achieving uniform dispersion of the negative electrode active material. Meanwhile, during the coating drying process, the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist the stress caused by the evaporation of the solvent during the drying process, such that the film surface is unlikely to crack.
  • the negative electrode plate has flexibility and toughness while maintaining excellent bonding performance, such that the problem of hard and brittle electrode plates caused by the use of existing binders can be effectively solved.
  • a thick coating is unlikely to crack, a cold-pressed electrode plate is unlikely to break, and powder is unlikely to fall in die-cutting and winding processes, thereby avoiding short-circuit inside a battery, and even fire, explosion, and other safety accidents.
  • the present disclosure provides a lithium battery.
  • the lithium battery includes the positive electrode plate and/or the negative electrode plate. Therefore, the lithium battery has excellent cycle performance.
  • the present disclosure provides a battery slurry.
  • the battery slurry includes an aqueous binder and an organic additive.
  • the organic additive has at least one of -NHR and -SH, and R is alkyl.
  • the inventors have found that, by adding the aqueous binder and the organic additive (the organic additive includes at least one group of -NHR and -SH) to the battery slurry, the organic additive of the battery slurry has polar functional groups, and can interact with active materials of the aqueous binder such as carboxyl groups and ester groups to generate intermolecular forces, thereby achieving uniform dispersion of the active materials. Meanwhile, during a coating drying process, the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist a stress generated by the evaporation of a solvent during the drying process so that a film surface is unlikely to crack.
  • the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist a stress generated by the evaporation of a solvent during the drying process so that a film surface is unlikely to crack.
  • the organic additive has both -NHR and -SH groups. That is, a mixture of an organic additive having -NHR groups and an organic additive having -SH groups is used.
  • the -NHR groups mainly provide an electrostatic dispersion function.
  • the -SH groups are prone to esterification and are more likely to react with the aqueous binder during the coating drying stage, thereby providing a partial cross-linking function, resisting the stress caused by uneven drying of the solvent, and preventing the film surface from cracking.
  • a mass ratio of the aqueous binder to the organic additive in the battery slurry is 22: (0.5 to 2).
  • the inventors have found that, if the addition amount of the aqueous binder is too low, a peeling force of the formed electrode plate is reduced, and powder fall off in the rolling, slitting, and winding processes; if the addition amount of the organic additive is too high, high cost is caused while part of small molecule additives cannot be baked out in the coating process, which may affect the cycle performance of a battery cell; and if the addition amount of the organic additive is too low, the flexibility of the film surface deteriorates.
  • a monomer of the aqueous binder includes, but is not limited to at least one of acrylate, acrylic acid, acrylonitrile, or acrylamide.
  • the organic additive includes, but is not limited to at least one of N-methylacetamide, triethylamine, acetamide, ethylenediamine, ethanethiol, 1,2-ethanedithiol, or polythiol, e.g., 1,2-ethanedithiol and amide small molecules.
  • the battery slurry is a positive electrode slurry
  • the positive electrode slurry includes a positive electrode active material, a conductive agent, the aqueous binder, and the organic additive.
  • a mass ratio of the positive electrode active material, the conductive agent to a sum of the aqueous binder and the organic additive is (94 to 98): (0.5 to 6): (2 to 5).
  • the inventors have found that, if the addition amount of the positive electrode active material is too low, the amount of main materials in the battery slurry formula will be less, resulting in a low battery cell capacity. Further, the film surface is harder and more brittle, and the rolling is broken.
  • the positive electrode active material is lithium iron phosphate
  • the conductive agent includes at least one of carbon nanotubes, graphene, or conductive carbon black.
  • the battery slurry is a negative electrode slurry
  • the negative electrode slurry includes graphite, a conductive agent, the aqueous binder, and the organic additive.
  • a mass ratio of the graphite, a mass of the conductive agent and a sum of the aqueous binder and the organic additive is (94 to 98) :(0.5 to 6): (2 to 5).
  • the inventors have found that, if the addition amount of the graphite is too low, the amount of main materials in the battery slurry formula will be less, resulting in a low energy density of the battery cell, and further, the film surface is more hard and brittle and the rolling is broken; and if the addition amount of the graphite is too high, a peeling force of the formed electrode plate is reduced, and powder fall off in the rolling, slitting, and winding processes.
  • the conductive agent includes at least one of carbon nanotubes, graphene, or conductive carbon black.
  • the present disclosure provides a positive electrode plate.
  • the positive electrode plate includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is formed on a surface of the positive electrode current collector, and is formed from the positive electrode slurry.
  • the positive electrode slurry is coated on the surface of the positive electrode current collector to form the positive electrode plate.
  • the organic additive in the positive electrode slurry has polar functional groups, and thus can interact with carboxyl and ester group of the aqueous binder, as well as the conductive agent, the positive electrode active material and the like to generate intermolecular forces, thereby achieving uniform dispersion of the positive electrode active material. Meanwhile, during the coating drying process, the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist the stress caused by the evaporation of the solvent during the drying process, such that the film surface is unlikely to crack.
  • the positive electrode plate has flexibility and toughness while maintaining excellent bonding performance, such that the problem of hard and brittle electrode plates caused by the use of existing binders can be effectively solved.
  • a thick coating is unlikely to crack, a cold-pressed electrode plate is unlikely to break, powder is unlikely to fall in die-cutting and winding processes, and a powder falling rate of the folded electrode plate is smaller than 5.47 wt%), thereby avoiding short-circuit inside a battery, and even fire, explosion, and other safety accidents.
  • the present disclosure provides a negative electrode plate.
  • the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is formed on a surface of the negative electrode current collector, and is formed from the above negative electrode slurry.
  • the negative electrode slurry is coated on the surface of the negative electrode current collector to form the negative electrode plate.
  • the organic additive in the negative electrode slurry has polar functional groups, and thus can interact with carboxyl and ester group of the aqueous binder, the negative electrode active material and the like to generate intermolecular forces, thereby achieving uniform dispersion of the negative electrode active material. Meanwhile, during the coating drying process, the organic additive with -NHR and/or -SH interacts with the aqueous binder to resist the stress caused by the evaporation of the solvent during the drying process, such that the film surface is unlikely to crack.
  • the negative electrode plate has flexibility and toughness while maintaining excellent bonding performance, such that the problem of hard and brittle electrode plates caused by the use of existing binders can be effectively solved.
  • a thick coating is unlikely to crack, a cold-pressed electrode plate is unlikely to break, powder is unlikely to fall in die-cutting and winding processes, and a powder falling rate of the folded electrode plate is smaller than 5.47 wt%), thereby avoiding short-circuit inside a battery, and even fire, explosion, and other safety accidents.
  • the present disclosure provides a lithium battery.
  • the lithium battery includes the positive electrode plate and/or the negative electrode plate. Therefore, the lithium battery has excellent cycle performance.
  • a positive electrode slurry includes 95 wt% of lithium iron phosphate, 2 wt% of binder, and 3 wt% of conductive carbon black.
  • the binder includes an aqueous binder of acrylate-acrylic acid-acrylonitrile-acrylamide and an organic additive of acetamide, and a mass ratio of the aqueous binder to the organic additive is 22: 1.
  • a method of preparing a positive electrode plate includes coating the positive electrode slurry on two surfaces of an aluminum foil and rolling the aluminum foil after the completion of coating, to form a positive electrode active material layer on the surfaces of the aluminum foil.
  • a coating weight is in a range of 147 g/m 2 to 165 g/m 2 .
  • a method of preparing a battery cell includes assembling the battery cell by taking the positive electrode plate as a positive electrode, taking graphite as a negative electrode, taking a mixed solution containing lithium hexafluorophosphate, vinyl carbonate, dimethyl carbonate, methyl ethyl carbonate, and various additives as an electrolytic solution (lithium hexafluorophosphate has a concentration of 1 mol/L), and taking a PP separator as a separator.
  • the aqueous binder is acrylate-acrylic acid-acrylonitrile-acrylamide, the organic additive is 1,2-ethanedithiol, and the rest is the same as Example 1.
  • the aqueous binder is acrylate-acrylic acid-acrylonitrile-acrylamide
  • the organic additive includes a mixture of 1,2-ethanedithiol and acetamide, and the rest is the same as Example 1.
  • Example 3 The coating is not cracked, and the positive electrode plate can be normally rolled and sliced. 68.8 wt% 9.7 N/m 4.2% Comparative Example The coating is cracked and the rolling is broken frequently, the positive electrode plate is sliced manually, rather than being sliced on a slitter. 62 wt% 8.3 N/m 5.47 wt% Table 2 Cycle performance of the batteries in Examples 1 to 3 and Comparative Example Capacity retention rate after 2000 cycles Example 1 83.11% Example 2 84.14% Example 3 83.27% Comparative Example 82.15%

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP22941543.5A 2022-05-11 2022-12-23 Batteriesuspension, positivelektrodenfolie, negativelektrodenfolie und lithiumbatterie Active EP4336601B1 (de)

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Application Number Priority Date Filing Date Title
CN202210514539.3A CN114883563B (zh) 2022-05-11 2022-05-11 电池浆料、正极极片、负极极片和锂电池
PCT/CN2022/141319 WO2023216610A1 (zh) 2022-05-11 2022-12-23 电池浆料、正极极片、负极极片和锂电池

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EP4336601A1 true EP4336601A1 (de) 2024-03-13
EP4336601A4 EP4336601A4 (de) 2025-03-12
EP4336601B1 EP4336601B1 (de) 2025-11-19

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US (1) US20240128457A1 (de)
EP (1) EP4336601B1 (de)
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WO (1) WO2023216610A1 (de)

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